240MHz

DUAL-CORE LX6

4MB

FLASH STORAGE

520KB

INTERNAL SRAM

WiFi +
BT+BLE

802.11n + BT 4.2

10µA

DEEP SLEEP

22+

USABLE GPIO

⚙️

Two Independent Cores

Core 0 runs the WiFi and Bluetooth protocol stacks. Core 1 is entirely free for your application code. This means WiFi and Bluetooth activity do not slow down sensor reading, display updates, or servo control on Core 1.

Real benefit: smooth 60fps servo control while streaming WiFi data simultaneously

📶

802.11 b/g/n WiFi — 2.4 GHz

Full TCP/IP stack built in. Connects to any standard router. Supports Station mode (connect to router), Soft-AP mode (create your own network), and both simultaneously. Max theoretical 150 Mbps on n mode.

Note: 2.4 GHz only — cannot connect to 5 GHz networks

📡

Classic BT 4.2 + BLE 4.2

The only popular ESP32 variant with full Classic Bluetooth including SPP Serial Port Profile (BluetoothSerial.h) and A2DP audio streaming. BLE 4.2 for low-power sensor advertising. This dual capability is exclusive to original ESP32.

Key differentiator vs ESP32-S3 which dropped Classic BT entirely

📻

Ultra Low Power Architecture

5 power modes: Active, Modem-Sleep, Light-Sleep, Deep-Sleep, Hibernation. Deep sleep drops to 10 µA with RTC timer running. Hibernation drops to ~5 µA. The RTC domain stays active for scheduled wake-ups even in the deepest sleep modes.

Real benefit: years of battery life on AA cells for sensor nodes

📲

Bluetooth Serial (SPP)

Use BluetoothSerial.h to create a virtual serial port over Classic BT. Any Android phone with the free Serial Bluetooth Terminal app can connect and exchange data. No pairing code needed in most cases.

Real use: phone-controlled robot, relay switch, LED controller

🎵

Bluetooth Audio (A2DP)

Receive audio from a phone over Classic Bluetooth A2DP profile and output to a speaker via I2S. Using the ESP32-A2DP library, the ESP32 becomes a Bluetooth speaker receiver in under 20 lines of code.

Real use: DIY Bluetooth speaker with MAX98357A amplifier

🔌

BLE Sensors & Beacons

BLE 4.2 for ultra-low-power sensor advertising. Broadcast temperature, humidity, or GPS data to any phone or BLE gateway without a pairing. Battery lasts months in BLE-only mode.

Real use: BLE environmental sensor node, iBeacon, asset tracker

🎮

Bluetooth Game Controller

Pair two ESP32 boards over Classic Bluetooth to build a wireless game controller. One board reads joystick and buttons, sends commands over BT Serial to the second board controlling motors or servos.

Real use: wireless RC car, drone controller, robot arm

🔢 2× 8-bit DAC (GPIO 25, 26)

True analog voltage output 0–3.3V. Use for audio tone generation, analog control signals, or waveform output. Not available on ESP8266 or ESP32-S3.

👋 10× Capacitive Touch

GPIO 0, 2, 4, 12–15, 27, 32, 33. Detect finger touch without mechanical contact. Can also wake ESP32 from deep sleep on touch.

🌹 18× 12-bit ADC Channels

ADC1 (GPIO 32–39) works reliably with WiFi. ADC2 (GPIO 0–27 subset) is disabled when WiFi is active. Resolution 0–4095 for 0–3.3V input.

🎶 2× I2S Audio Interface

High-quality audio input (INMP441 microphone) and output (MAX98357A amplifier). Supports 8–32 bit samples at up to 80 kHz sample rate.

💋 2× SPI + 2× I2C + 3× UART

Any GPIO can be assigned to SPI/I2C/UART via the GPIO Matrix. Connect RFID, SD card, OLED display, GPS, and GSM module simultaneously.

🛤 1× CAN 2.0 Controller

Hardware CAN bus controller for automotive and industrial applications. Needs external CAN transceiver (SN65HVD230) — great for vehicle OBD or industrial sensor networks.

🔍 BOOT Button (GPIO 0)

During upload: Hold BOOT, press RESET, release RESET, then release BOOT to force the board into download mode if auto-reset fails.

In your code: GPIO 0 can be read as a regular button after boot. Press = LOW. The internal pull-up means it reads HIGH when not pressed.

Common use: factory reset trigger, OTA update start button

⚇ RESET Button (EN pin)

Function: Restarts the ESP32 immediately and runs your code from the beginning. Equivalent to power cycling.

After upload: Press RESET once after uploading a new sketch to start running the new code if it does not auto-start.

Note: does not erase flash — your code and SPIFFS data are preserved

Control lights, fans, and appliances via WiFi from any phone using a web interface hosted directly on the ESP32. Integrate with Home Assistant via MQTT. Why this board: dual-core means WiFi runs on Core 0 and sensor/relay code on Core 1 with zero interference. Cheap enough to install one in every room.

Real capability: control 8 relays + read 4 sensors + host web dashboard simultaneously

Control a robot or car directly from your Android phone via Classic Bluetooth using the free Serial Bluetooth Terminal app. No internet required. Why this board: Classic BT Serial is exclusive to original ESP32 — the ESP32-S3 and ESP8266 cannot do this at all.

Real capability: full joystick phone control, bidirectional data, under 20 lines of code

Read DHT22, BMP280, soil moisture sensors, sleep for 10 minutes, wake, upload to ThingSpeak or Telegram, and sleep again. Why this board: 10 µA deep sleep means a 10,000 mAh solar power bank can run this indefinitely outdoors.

Real capability: months of autonomous operation with a 6V 2W solar panel

Receive audio from a phone over Classic Bluetooth A2DP, decode it in real-time, and output to a MAX98357A I2S amplifier + speaker. Why this board: Classic BT A2DP is only available on original ESP32 — ESP32-S3 has no Classic BT.

Real capability: stereo Bluetooth audio at 44.1 kHz to 3W speaker

Connect MFRC-522 RFID, log scans to Google Sheets or a Telegram bot via WiFi, and trigger a relay for door unlock. Why this board: SPI for RFID + relay output + WiFi logging all run on dual-core without timing conflicts.

Real capability: RFID scan to Telegram notification in under 500 ms

🎓 Beginners

Your first WiFi or Bluetooth project. The largest tutorial community of any embedded board. Arduino IDE makes it easy with zero prior experience.

📚 Students

University IoT lab assignments, science fair projects, and embedded systems coursework. The ESP32 is used in most engineering courses across Bangladesh.

⚙️ Engineers

Rapid prototyping of WiFi or Bluetooth enabled products — home automation, industrial monitoring, wireless data logging, and RFID access systems.

🔧 Makers

DIY Bluetooth speakers, RC vehicles, smart gadgets, RFID locks — the ESP32 is the maker community’s most popular wireless microcontroller worldwide.

ARDUINO IDE → TOOLS MENU — EXACT SETTINGS FOR ESP32 TYPE-C 30 PIN

⬇ Download .ino

// ESP32 WiFi Station Mode -- Dream RC Bangladesh
#include <WiFi.h>
const char* ssid = "Your_WiFi_Name";
const char* pass = "Your_Password";
void setup() {
  Serial.begin(115200);
  WiFi.begin(ssid, pass);
  Serial.print("Connecting");
  while (WiFi.status() != WL_CONNECTED) { delay(500); Serial.print("."); }
  Serial.println("\n Connected! IP: " + WiFi.localIP().toString());
}
void loop() { delay(10000); }

Open Serial Monitor at 115200. WiFi must be 2.4 GHz — ESP32 cannot connect to 5 GHz networks.

⬇ Download .ino

// Classic Bluetooth Serial -- Dream RC Bangladesh
// Pair phone with "DreamRC-ESP32", use Serial BT Terminal app
#include <BluetoothSerial.h>
BluetoothSerial SerialBT;
#define LED 2
void setup() {
  Serial.begin(115200);
  SerialBT.begin("DreamRC-ESP32");
  pinMode(LED, OUTPUT);
  Serial.println("BT Ready! Connect to: DreamRC-ESP32");
}
void loop() {
  if (SerialBT.available()) {
    char c = SerialBT.read();
    if (c == '1') { digitalWrite(LED, HIGH); SerialBT.println("LED ON"); }
    if (c == '0') { digitalWrite(LED, LOW);  SerialBT.println("LED OFF"); }
  }
}

⚠️ Classic BT Serial only works on original ESP32. Send ‘1’ to turn LED on, ‘0’ off from Serial Bluetooth Terminal app.

// ESP32 Web Server with GPIO -- Dream RC Bangladesh
#include <WiFi.h>
#include <WebServer.h>
const char* ssid="Your_WiFi"; const char* pass="Your_Pass";
#define LED 2
WebServer server(80);
void setup() {
  pinMode(LED,OUTPUT); WiFi.begin(ssid,pass);
  while(WiFi.status()!=WL_CONNECTED)delay(500);
  Serial.println("Open: http://"+WiFi.localIP().toString());
  server.on("/",[](){ server.send(200,"text/html","<h2>ESP32</h2><a href='/on'><button>ON</button></a> <a href='/off'><button>OFF</button></a>"); });
  server.on("/on", [](){ digitalWrite(LED,HIGH); server.sendHeader("Location","/"); server.send(303); });
  server.on("/off",[](){ digitalWrite(LED,LOW);  server.sendHeader("Location","/"); server.send(303); });
  server.begin();
}
void loop() { server.handleClient(); }

⬇ Download .ino

// Deep Sleep Timer Wake-Up -- Dream RC Bangladesh
#define uS_PER_S  1000000ULL
#define SLEEP_SEC 30        // Wake every 30 seconds

void setup() {
  Serial.begin(115200);
  Serial.println("ESP32 woke up!");
  // ── Do your work here ──────────────────────────
  // Read sensor, upload to WiFi, send Telegram etc
  delay(1000);
  // ── Go back to deep sleep ──────────────────────
  Serial.println("Sleeping 30 s...");
  esp_sleep_enable_timer_wakeup(SLEEP_SEC * uS_PER_S);
  Serial.flush();
  esp_deep_sleep_start();
}
void loop() {} // Never reached in deep sleep mode

After deep_sleep_start() the board resets and runs setup() again. Save state between sleeps using RTC memory variables.

📈 Range

200–500 m open area without a router. Extended by chaining relay nodes in mesh configuration.

⚡ Latency

Under 2 ms — far lower than WiFi (10–200 ms). Ideal for real-time control like RC vehicles and drone controllers.

👥 Devices

Up to 20 paired devices. One controller board can send commands to 20 slave boards simultaneously (broadcast).

🏠 Mesh Use

Relay sensor data across large areas — agricultural monitoring, warehouse inventory, smart building floors — all without WiFi infrastructure.

1 × ESP32 Type-C 30 Pin Development Board

USB-C data cable not included. Pin headers pre-soldered. Genuine ESP32 chip.